The field of construction is always affected by a large number of accidents at work that
have many different causes and responsible. Therefore, it is of utmost importance to
focus on all these issues, in order to reduce all risk factors that can undermine
individuals’ safety on building sites. The objective of the research is then the
development of a method for quick on site analysis of all critical issues that can create
accidents and identification of the related causes in order to directly provide a correct
and focused training identified as the best method to act on the causes to reduce
accidents. The research was carried on during construction of the Universal Exhibition
of Milan – Expo 2015 – that counted almost 70 contemporary construction sites. To
reach the goals further research steps has been followed and in particular: (i)
inspections on building sites through all the Expo area; (ii) analysis of the main
identified problems; (iii) development of a methodology to quickly identify the cause
of problems; (iv) validation of the method through back office analysis of site
documents; (v) correct on-site training according to found problem. During the whole
construction site, the improvements in criticalities solving have been visible thanks to
the focused training. The developed method, carried on in a high-risk environment, is
applicable in any other building sites and environment as independent from the
boundary conditions of the place
